“Today’s updated Apple Headquarters Spaceship campus plans include a roof made almost entirely out of solar cells, according to details released today,” Seth Weintraub reports for 9to5Mac.

“With a building as large as Apple’s, that puts it in the top corporate solar installations in the world and the biggest in the US,” Weintraub reports. “The current title holder is the 4.26 MW system in Edison New Jersey and another being built by ToysRus in sunny NJ is rated 5.38MW.”